unittest installation error Could not find a version that satisfies the requirement

匿名 (未验证) 提交于 2019-12-03 08:57:35

问题:

Could someone please help me with this error message:

Could not find a version that satisfies the requirement unittest 

I installed latest Python and PyCharm and try to install the package unittest but get above error. So far my experience with Python is a bit like dll hell ...

回答1:

If you tried this:

$ pip install unittest Collecting unittest    Could not find a version that satisfies the requirement unittest (from versions: ) No matching distribution found for unittest 

It's normal to have an error because unittest is not a valid package on Pypi. The only distribuable is unittest2-0.0.0.tar.gz but the name is not correct, it should be unittest-0.0.0.tar.gz (without "2"). In fact I think it's an error and if you want to use this one you need to install unittest2 (which is a backport of unittest for Python 2.6).

But unittest is a standard module, which you don't need to install:

$ python -m unittest  ---------------------------------------------------------------------- Ran 0 tests in 0.000s  OK 


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